运行条件对耦合电袋除尘性能影响的试验研究

Experimental study on the effect of operating conditions on the performance of coupled electrostatic bag dust removal

根据工业中除尘器的运行条件可设计试验系统运行工况,并探究电袋除尘器结构是否能够满足工业应用。模拟工业锅炉半干法脱硫与电袋除尘器污染物处理模式下的颗粒物排放特性,依托耦合电袋除尘器实验平台,通过设计实验参数以改变除尘器入口颗粒物浓度及布袋除尘区过滤风速,探讨入口颗粒物浓度及过滤风速对除尘器除尘性能的影响,确定适合电袋除尘器结构的最佳运行工况。结果显示:随着入口颗粒物浓度的增加,颗粒物排放浓度也会相应增加,当入口颗粒物浓度为162.12 g/m^(3)时,排放浓度超出工业锅炉现行的排放标准;当入口颗粒物浓度小于80 g/m^(3)时,颗粒物排放浓度低于10 mg/m^(3),符合普通地区的超低排放标准。随着入口颗粒物浓度的增加,总能耗呈上升趋势。保持入口颗粒物浓度、除尘器结构和施加的电压不变,仅改变过滤风速则发现随着过滤风速的增加,除尘器出口颗粒物浓度逐渐增加;当过滤风速≤1.62 m/min时,出口排放总浓度<10 mg/m^(3);当过滤风速>1.62 m/min时,排放浓度>10 mg/m^(3)。随着过滤风速的增加则电耗减小,由压降产生的能耗越来越大,2种能耗总和也越来越大。

Based on the operating conditions of industrial dust collectors,experimental system operating conditions can be designed,and whether the structure of electric bag dust collectors can meet industrial applications can be explored.Under industrial boiler semi dry desulfurization and electric bag dust collector pollutant treatment mode,the particulate matter emission characteristics were simulated.Relying on the coupled electric bag dust collector experimental platform,the experimental parameters were designed to change the inlet particulate matter concentration of the dust collector and the filtration wind speed in the bag dust removal area.The influence of inlet particulate matter concentration and filtration wind speed on the dust removal performance of the dust collector were discussed,and the optimal operating conditions suitable for the structure of the electric bag dust collector were determined.The results show that as the concentration of particulate matter at the inlet increases,the emission concentration of particulate matter also increases accordingly.When the concentration of particulate matter at the inlet is 162.12 g/m^(3),the emission concentration exceeds the current emission standards for industrial boilers;when the concentration of particulate matter at the inlet is less than 80 g/m^(3),the emission concentration of particulate matter is less than 10 mg/m^(3),which meets the ultra-low emission standards of ordinary regions.As the concentration of particulate matter at the inlet increases,the total energy consumption shows an upward trend.Keeping the concentration of particulate matter at the inlet,the structure of the dust collector and the applied voltage are unchanged,only changing the filtration wind speed reveals that as the filtration wind speed increases,the concentration of particulate matter at the outlet of the dust collector gradually increases;when the filtering wind speed is≤1.62 m/min,the total concentration of outlet emissions is<10 mg/m^(3);when the filtration wind speed is>1.62 m/min,the emission concentration is>10 mg/m^(3).As the filtering wind speed increases,the power consumption decreases,the energy consumption generated by the pressure drop increases,and the sum of the two types of energy consumption also increases.